Leptin (hormon)

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Leptin (Šablon:Jez-grč-lat - tanak) je proteinski hormon saa 16 kDa. On učestvuje u regulaciji unosa i potrošnje energije, putem uvećavanja apetita i metabolizma. On je jedan od najvažnijih hormona adipoznog porekla.[1] Gen Ob(Lep) (Ob za Šablon:Jez-eng-lat - gojazan) je lociran na hromozomu 7 kod čoveka.[2]

Otkriće[uredi | uredi izvor]

Efekti leptina su proučavani 1950-tih putem studiranja mutiranih gojaznih miševa, koji se nasumično javljaju u kolonijama miševa u Džeksonovoj laboratoriji.[3] Ti miševi su bili izuzetno gojazni i preterano alavi. Ultimatno, za više sojeva laboratorijskih miševa je utvrđeno da su homozigotni za jednu gensku-mutaciju koja je uzrokovala njihovu izuzetnu gojaznost. Oni se svrstavaju u dvije klase:

  • „ob/ob“, oni sa mutacijama gena za proteinski hormon leptin, i
  • „db/db“, oni sa mutacijama gena za receptor leptina.

Kad su ob/ob miševi tretirani injekcijama leptina, oni su izgubili njihovu suvišnu masnoću i vratili se na normalnu tjelesnu težinu.

Leptin je otkrio 1994. Džefri M. Fridman sa saradnicima na Rokfelerovom univerzitetu putem studija takvih miševa.[4]

Također pogledajte[uredi | uredi izvor]

Literatura[uredi | uredi izvor]

  1. ^ Brennan AM, Mantzoros CS (June 2006). "Drug Insight: the role of leptin in human physiology and pathophysiology--emerging clinical applications". Nat Clin Pract Endocrinol Metab 2 (6): 318–27.
  2. ^ GreGreen ED, Maffei M, Braden VV, Proenca R, DeSilva U, Zhang Y, Chua SC Jr, Leibel RL, Weissenbach J, Friedman JM (August 1995). "The human obese (OB) gene: RNA expression pattern and mapping on the physical, cytogenetic, and genetic maps of chromosome 7". Genome Res. 5 (1): 5–12.
  3. ^ Ingalls AM, Dickie MM, Snell GD (December 1950). "Obese, a new mutation in the house mouse". J. Hered. 41 (12): 317–8.
  4. ^ Zhang Y, Proenca R, Maffei M, Barone M, Leopold L, Friedman JM (December 1994). "Positional cloning of the mouse obese gene and its human homologue". Nature 372 (6505): 425–32.

Dodatna literatura[uredi | uredi izvor]

  • Torday JS, Sun H, Wang L, Torres E, Sunday ME, Rubin LP (March 2002). "Leptin mediates the parathyroid hormone-related protein paracrine stimulation of fetal lung maturation". Am. J. Physiol. Lung Cell Mol. Physiol. 282 (3): L405–10.
  • Torday JS, Rehan VK (July 2002). "Stretch-stimulated surfactant synthesis is coordinated by the paracrine actions of PTHrP and leptin". Am. J. Physiol. Lung Cell Mol. Physiol. 283 (1): L130–5.
  • Dubey L, Hesong Z (2006). "Role of leptin in atherogenesis". Exp Clin Cardiol 11 (4): 269–75.
  • Friedman JM, Halaas JL (1998). "Leptin and the regulation of body weight in mammals.". Nature 395 (6704): 763–70.
  • Prolo P, Wong ML, Licinio J (1999). "Leptin.". Int. J. Biochem. Cell Biol. 30 (12): 1285–90.
  • Heshka JT, Jones PJ (2001). "A role for dietary fat in leptin receptor, OB-Rb, function.". Life Sci. 69 (9): 987–1003.
  • Janeckova R (2002). "The role of leptin in human physiology and pathophysiology.". Physiological research / Academia Scientiarum Bohemoslovaca 50 (5): 443–59.
  • Lee DW, Leinung MC, Rozhavskaya-Arena M, Grasso P (2002). "Leptin and the treatment of obesity: its current status.". Eur. J. Pharmacol. 440 (2-3): 129–39.
  • Al-Daghri N, Bartlett WA, Jones AF, Kumar S (2002). "Role of leptin in glucose metabolism in type 2 diabetes.". Diabetes, obesity & metabolism 4 (3): 147–55.
  • Sabath Silva EF (2002). "[Leptin]". Rev. Invest. Clin. 54 (2): 161–5.
  • Thomas T, Burguera B (2003). "Is leptin the link between fat and bone mass?". J. Bone Miner. Res. 17 (9): 1563–9.
  • Kraemer RR, Chu H, Castracane VD (2002). "Leptin and exercise.". Exp. Biol. Med. (Maywood) 227 (9): 701–8.
  • Waelput W, Brouckaert P, Broekaert D, Tavernier J (2003). "A role for leptin in the systemic inflammatory response syndrome (SIRS) and in immune response.". Current drug targets. Inflammation and allergy 1 (3): 277–89.
  • Stenvinkel P, Pecoits-Filho R, Lindholm B (2004). "Leptin, ghrelin, and proinflammatory cytokines: compounds with nutritional impact in chronic kidney disease?". Advances in renal replacement therapy 10 (4): 332–45.
  • Cohen P, Ntambi JM, Friedman JM (2004). "Stearoyl-CoA desaturase-1 and the metabolic syndrome.". Curr. Drug Targets Immune Endocr. Metabol. Disord. 3 (4): 271–80.
  • Sahu A (2004). "Leptin signaling in the hypothalamus: emphasis on energy homeostasis and leptin resistance.". Frontiers in neuroendocrinology 24 (4): 225–53.
  • Elefteriou F, Karsenty G (2004). "[Bone mass regulation by leptin: a hypothalamic control of bone formation]". Pathol. Biol. 52 (3): 148–53.
  • Blüher S, Mantzoros CS (2004). "The role of leptin in regulating neuroendocrine function in humans.". J. Nutr. 134 (9): 2469S–2474S.
  • Farooqi S, O'Rahilly S (2007). "Genetics of obesity in humans.". Endocr. Rev. 27 (7): 710–18.


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